The dissertation entitled, “Bridging the Gap Between Test Versions: WAIS-III/IV Matrix Reasoning as an Embedded Symptom Validity Indicator,” compared large samples of credible and non-credible patients on several WAIS-III Matrix Reasoning variables. An equation combining the most discrepant items present on both the WAIS-III and WAIS-IV was found to be moderately successful. This equation could potentially be used with both versions of the test, allowing for greater clinician flexibility.